Working ON your business
The E-myth Revisited by Michael E. Gerber is one of the classic works in business writing. If you haven’t read it, I’d highly recommend it. It talks about working ON your business rather than IN your business. In freelance medical writing, that would mean avoiding getting bogged down in meeting never ending deadlines and spending time thinking about your business. You should consider which clients you should keep and which you should let go, evaluate software that might help you perform your work more efficiently, think about ways you can outsource tasks that can be done by others, etc. etc.